1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a47061c44e22359ee1e390b8b8d2a18b49fd9573c75c469d0c0f8da6bb3d27. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ca5a92c-bfd0-44f8-94ba-2165ef17ce4c.json and https://artists.proofprofile.net/proofs/artist/4ca5a92c-bfd0-44f8-94ba-2165ef17ce4c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f054acce1469f55132d2661b85b3e9a3f8778837ccd1704ce54a739ee67d975. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:38:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES71850412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35a3e562abbd7f4b49fe873334de3bd17077ba1f4efda7d0fc9e94c0985504e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-19T23:56:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWB11902270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe636e76f2b7403ed5edd31738d936d2eeada42081b1a081f6ac453abf57cf47f. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWB11902273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9af84fff9b7a25e4d07f8f781f37a8c2dc42ceb8f0a95ed032ff224dd0f727c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWB11902274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f5aa1f37ab21662d0266a3ddcb5fde137752739865fd0d927f274cfa89e544. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWB11901841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3524e49a22ec3ec50da2fca1b4b51df57177a2b103b134f7c949026fd20991. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES71850413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de19fe082c0d16382c55afec60af5eade00934d3af81b66be452e28b5bdf825. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:48:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWB12000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b93d59d7699884ed33d4aaa610c39b061d9f233dca94d73fb82ce295240b543. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWB12002108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7be7e75e4e7a4d80833fad1703b35f7314986ffba811735e7f2ca377d21226. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWB12002109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de19fe082c0d16382c55afec60af5eade00934d3af81b66be452e28b5bdf825. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWB12000501.